Answer:
M = 63.86 g/mol
Explanation:
Given data:
Density of gas = 2.18 g/L
Temperature = 66°C
Pressure = 720 mmHg
Molar mass of gas = ?
Solution:
Temperature = 66°C = 66+273 = 339 K
Pressure = 720 mmHg = 720/760 = 0.95 atm
Formula:
d = MP/RT
R = general gas constant = 0.0821 atm.L /mol.K
Now we will put the values in formula.
2.18 g/L = M × 0.95 atm / 0.0821 atm.L /mol.K ×339 K
M = 2.18 g/L× 0.0821 atm.L /mol.K ×339 K / 0.95 atm
M = 60.67 g/mol / 0.95
M = 63.86 g/mol
